win a ball from Bowling.com
« previous next »
Pages: [1] 2

Author Topic: RPM  (Read 2886 times)

makpa

  • Full Member
  • ***
  • Posts: 226
RPM
« on: January 01, 2009, 08:13:27 PM »
can anybody help me here. if i have 24 revs from release to i hit the pins, what is the rpm then?
Logged

 

taylorsproshop

  • Jr. Member
  • **
  • Posts: 47
Re: RPM
« Reply #1 on: January 02, 2009, 04:24:47 AM »
Think it would also depend on how fast you ball speed is...
Obviously if you ball speed is faster your rev rate will be higher and if slower lower...
Logged

makpa

  • Full Member
  • ***
  • Posts: 226
Re: RPM
« Reply #2 on: January 02, 2009, 04:43:44 AM »
my speed is about 30 kmh 18-19 mph
Logged

LuckyLefty

  • Hero Member
  • *****
  • Posts: 17348
Re: RPM
« Reply #3 on: January 02, 2009, 04:47:41 AM »
You are in very good shape!  Now with all those awesome specs....just hit the pocket....they will ALL go boom!  Virtually every time!

REgards,

Luckylefty
--------------------
Open the door...see what's possible...and just walk right on through...that's how easy success feels..
Logged
It takes Courage to have Faith, and Faith to have Courage.

James M. McCurley, New Orleans, Louisiana

makpa

  • Full Member
  • ***
  • Posts: 226
Re: RPM
« Reply #4 on: January 02, 2009, 04:51:13 AM »
lol yeah i know. but stil dont use the terms rpm where im from. so it was more so i can relate to other people with about the same specs
Logged

LuckyLefty

  • Hero Member
  • *****
  • Posts: 17348
Re: RPM
« Reply #5 on: January 02, 2009, 04:54:57 AM »
high RPM
--------------------
Open the door...see what's possible...and just walk right on through...that's how easy success feels..
Logged
It takes Courage to have Faith, and Faith to have Courage.

James M. McCurley, New Orleans, Louisiana

makpa

  • Full Member
  • ***
  • Posts: 226
Re: RPM
« Reply #6 on: January 02, 2009, 04:59:01 AM »
yeah i gues so. but it would be more like 450 rpm right???

Edited on 1/2/2009 5:59 AM
Logged

dizzyfugu

  • Hero Member
  • *****
  • Posts: 7606
Re: RPM
« Reply #7 on: January 02, 2009, 05:14:54 AM »
Yup. A rough estimate/conversion from hand revs to RPMs is to multiply the hand revs by 19-20, which would mean something around 450 RPM for you - if the hand revs have been recorded correctly. Besides, it is just a ROUGH estimate with a lot of variance. Say 400+, that should fit, medium to high RPMs.
--------------------
DizzyFugu - Reporting from Germany

Confused by bowling?
Check out BR.com's vault of wisdom: the unofficial FAQ section

Bored? Try this: http://www.dancingpaul.com/



Edited on 1/2/2009 6:15 AM
Logged
DizzyFugu ~ Reporting from Germany

LuckyLefty

  • Hero Member
  • *****
  • Posts: 17348
Re: RPM
« Reply #8 on: January 02, 2009, 05:17:16 AM »
Dizzy.....I'd like to be medium!  Your medium!

Walter Ray is medium in my mind compared to ALL bowlers!  Low for PBA players.

REgards,

Luckylefty
--------------------
Open the door...see what's possible...and just walk right on through...that's how easy success feels..
Logged
It takes Courage to have Faith, and Faith to have Courage.

James M. McCurley, New Orleans, Louisiana

makpa

  • Full Member
  • ***
  • Posts: 226
Re: RPM
« Reply #9 on: January 02, 2009, 05:20:31 AM »
i filmed it with a video camera several times and its constant arround 24 revs. så tha meens 450+-
Logged

makpa

  • Full Member
  • ***
  • Posts: 226
Re: RPM
« Reply #10 on: January 02, 2009, 06:02:41 AM »
650 rpm, thats a big diffrent from 450.
Logged

makpa

  • Full Member
  • ***
  • Posts: 226
Re: RPM
« Reply #11 on: January 02, 2009, 06:18:42 AM »
i know the hand revs is counted correctly. as it has been done several times with camera and it is consistent. it could also be that equation that is some what wrong. but i dont know that is why i asked in here
Logged

Burak Natal

  • Sr. Member
  • ****
  • Posts: 352
Re: RPM
« Reply #12 on: January 02, 2009, 09:06:56 AM »
makpa,
Search feature is very handy. You should try it from time to time
http://www.ballreviews.com/Forum/Replies.asp?TopicID=223237&ForumID=16&CategoryID=5


rockteschel,
As you know, with the friction and the axis migration, balls rev harder down the lane. That's why rev rate is usually measured with the only revs created till some point before the ball reaches backends. It can be first 10 frames, till arrows etc. Than it is multiplied by a factor to compute rpms or hand revs..

In any case, 24 hand revs is really huge, if you are not rolling with 6mph ofcourse
--------------------
Regards,
Natal
Logged
Regards,

Natal
International Track Staffer

makpa

  • Full Member
  • ***
  • Posts: 226
Re: RPM
« Reply #13 on: January 02, 2009, 01:31:26 PM »
lol hehe. but still then i have to use a camera ONCE again hmm okay so there is no easy way to calculate it damn :S
Logged

the pooh

  • Hero Member
  • *****
  • Posts: 615
Re: RPM
« Reply #14 on: January 02, 2009, 06:53:27 PM »
A way to get it close is to use the formula: revolutions/seconds =r/60. 18 mph equals 2.2 seconds from foul line to headpin(average speed).Using your counted revolutions of 24 down the entire lane ,the formula would yield 654 rpm!You are definitely high rpm!
--------------------
the pooh
Logged
the pooh
Pages: [1] 2
« previous next »